Does anyone know where I can buy an unresonated 3 inch test pipe? It seems I can only find 2.5-inch test pipes. I know I can still use a 2.5-inch T.P. with a 3-inch exhaust pipe, but a 3-inch T.P. will perform better with it. I know 2 people with S2K's who have gained alot of power by going with a custom single 3 inch exhaust and test pipe. Thanks.

 

If you want a 3" test pipe, you will have to have it made.
No shop worth it's license would remove a cat converter from a street car, or install a test pipe on a street car. You will have to do it your self or get a shop willing to risk a huge fine $$$$$$$$ to do it for you.

 

Inline Pro will make it for you.

You have to put it in. like the puddydad said, big fine for the shop.

 

I have seen mechanical O2 sensor tricker all over the foe sale forum. Basically it looks like a tapped spark plug oil anti-fouler.

 

Guys, forget about trying to fool the ECU electronically. Go to the auto store, but a set of spark plug foulers (2 to a pack), ream one out 'til the o2 probe fits in. Connect both foulers to your o2 bung. Connect your o2 sensor. Finished.

It'll take all of about 10 minutes and $4. It really is that simple

 

 

Can't you just leave the O2 hanging outside the test pipe? And also how is the MPG with the test pipe installed?

 

well if you want a do-it-yourself kinda job, just take the stock cat and bore the sucker out w/ a drill. sounds ghetto to some but trust me it'll take a while w/ an average drill/bit but it's worth it. air flow is air flow

 

do you have any pics of this in stall that would help me do this mod this week when my test pipe comes in .

 

The ony pic i have of it is of the entire exhaust from a for-sale thread. I englarged it and zoomed in on the 02sensor fix, but the quality of the pic isn't very good. Hope it helps.